Coronary artery bypass grafting is the world's most frequently carried out heart operation. Fig. 6.1 shows a diagram of a coronary bypass. The graft is a piece of healthy blood vessel. The blood vessel shown in Fig. 6.1 is the internal mammary artery. Surgeons commonly choose it because it is fairly resistant to arteriosclerosis.
(a)[3]
Using label lines, apply the following letters to Fig. 6.1:
A aorta
B coronary artery
C internal mammary artery
D pulmonary artery
E right atrium
F vena cava
(b)[1]
On Fig. 6.1, place an X on the diseased part of the coronary artery that the surgery has been carried out to treat.
(c)[3]
With reference to coronary heart bypass surgery, discuss the difficulties involved in finding a balance between prevention and cure.
Worked solution & mark scheme
This 7-mark question has a full step-by-step worked solution and mark scheme. One marking point: “three accurately placed labels on the heart diagram” …